Brent, Corrigan and Bieber went out to birdwatching. Each one saw a bird that no one else did. Each pair between them saw a bird that the third didn't. Finally, one bird was seen by everyone. From the birds Brent saw, 2 were yellow. From the birds Corrigan saw, 3 were yellow. From the birds Bieber saw, 4 were yellow.
How many yellow birds were seen altogether?
How many birds with other colors were seen altogether?
+128475 Here's my answer
All saw yellow bird 5
Bierber saw 4 yellow birds, yellow bird 4 was seen by him only, yellow bird 2 was seen by him and Brent and not seen by Corrigan, yellow bird 3 was seen by him and Corrigan and not seen by Brent
Corrigan saw 3 yellow birds and one non-yelllow bird. He and Bieber see yellow bird 3 that was not seen by Brent. He and Brent see non-yellow bird 2 that is not seen by Bieber.
Brent saw 2 yellow and 2 non-yellow birds. He sees non-yellow bird 1 that is not seen by the others.
5 yellow birds were seen....2 non-yellow birds were seen.
+7188 How? Each saw 1 bird the other didn't. 3 birds witnesses. Each pair saw a bird the other didn't. 6 more witnesses. They all finally saw one bird. 3 witnesses. They all saw 4 birds. What did I do wrong?
+128475 Here's my answer
All saw yellow bird 5
Bierber saw 4 yellow birds, yellow bird 4 was seen by him only, yellow bird 2 was seen by him and Brent and not seen by Corrigan, yellow bird 3 was seen by him and Corrigan and not seen by Brent
Corrigan saw 3 yellow birds and one non-yelllow bird. He and Bieber see yellow bird 3 that was not seen by Brent. He and Brent see non-yellow bird 2 that is not seen by Bieber.
Brent saw 2 yellow and 2 non-yellow birds. He sees non-yellow bird 1 that is not seen by the others.
5 yellow birds were seen....2 non-yellow birds were seen.
